ATMEGA8515-16PU Atmel, ATMEGA8515-16PU Datasheet - Page 31
![IC AVR MCU 8K 16MHZ 5V 40DIP](/photos/6/70/67049/453-40-dip_sml.jpg)
ATMEGA8515-16PU
Manufacturer Part Number
ATMEGA8515-16PU
Description
IC AVR MCU 8K 16MHZ 5V 40DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8515-16PU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
EBI/EMI, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
35
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Cpu Speed
16 MIPS
Eeprom Memory
512 Bytes
Input Output
35
Interface
SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
8K Bytes
Timers
1-8-bit, 1-16-bit
Voltage, Range
4.5-5.5 V
Processor Series
ATMEGA8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SPI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
35
Number Of Timers
2
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA8515-16PU
Manufacturer:
AT
Quantity:
20 000
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Special Function IO Register –
SFIOR
Using all Locations of
External Memory Smaller than
64 KB
2512K–AVR–01/10
• Bit 6 – XMBK: External Memory Bus Keeper Enable
Writing XMBK to one enables the Bus Keeper on the AD7:0 lines. When the Bus Keeper
is enabled, AD7:0 will keep the last driven value on the lines even if the XMEM interface
has tri-stated the lines. Writing XMBK to zero disables the Bus Keeper. XMBK is not
qualified with SRE, so even if the XMEM interface is disabled, the Bus Keepers are still
activated as long as XMBK is one.
• Bit 5..3 – XMM2, XMM1, XMM0: External Memory High Mask
When the External Memory is enabled, all Port C pins are used for the high address
byte by default. If the full 64,928 bytes address space is not required to access the
External Memory, some, or all, Port C pins can be released for normal Port Pin function
as described in Table 4. As described in “Using all 64KB Locations of External Memory”
on page 33, it is possible to use the XMMn bits to access all 64KB locations of the Exter-
nal Memory.
Table 4. Port C Pins Released as Normal Port Pins when the External Memory is
Enabled
Since the external memory is mapped after the internal memory as shown in Figure 11,
the external memory is not addressed when addressing the first 608 bytes of data
space. It may appear that the first 608 bytes of the external memory are inaccessible
(external memory addresses 0x0000 to 0x025F). However, when connecting an exter-
nal memory smaller than 64 KB, for example 32 KB, these locations are easily accessed
simply by addressing from address 0x8000 to 0x825F. Since the External Memory
Address bit A15 is not connected to the external memory, addresses 0x8000 to 0x825F
will appear as addresses 0x0000 to 0x025F for the external memory. Addressing above
address 0x825F is not recommended, since this will address an external memory loca-
tion that is already accessed by another (lower) address. To the Application software,
the external 32 KB memory will appear as one linear 32 KB address space from 0x0260
to 0x825F. This is illustrated in Figure 17.
Bit
Read/Write
Initial Value
XMM2
0
0
0
0
1
1
1
1
XMM1
0
0
1
1
0
0
1
1
R/W
7
–
0
XMM0
0
1
0
1
0
1
0
1
XMBK
R/W
6
0
# Bits for External Memory Address
8 (Full 64,928 Bytes Space)
7
6
5
4
3
2
No Address High bits
XMM2
R/W
5
0
XMM1
R/W
4
0
XMM0
R/W
3
0
PUD
R/W
2
0
ATmega8515(L)
R/W
1
–
0
Released Port Pins
None
PC7
PC7 - PC6
PC7 - PC5
PC7 - PC4
PC7 - PC3
PC7 - PC2
Full Port C
PSR10
R/W
0
0
SFIOR
31
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